EP2333112B1 - Brustkrebsprognose - Google Patents

Brustkrebsprognose Download PDF

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EP2333112B1
EP2333112B1 EP10178199.5A EP10178199A EP2333112B1 EP 2333112 B1 EP2333112 B1 EP 2333112B1 EP 10178199 A EP10178199 A EP 10178199A EP 2333112 B1 EP2333112 B1 EP 2333112B1
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gene
protein
expression
patients
genes
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French (fr)
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EP2333112A2 (de
EP2333112A3 (de
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Yixin Wang
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Janssen Diagnostics LLC
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Janssen Diagnostics LLC
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Priority claimed from EP05732080.6A external-priority patent/EP1721159B1/de
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    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
    • C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
    • C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
    • C12Q1/6876—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes
    • C12Q1/6883—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes for diseases caused by alterations of genetic material
    • C12Q1/6886—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes for diseases caused by alterations of genetic material for cancer
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
    • C12Q2600/00—Oligonucleotides characterized by their use
    • C12Q2600/106—Pharmacogenomics, i.e. genetic variability in individual responses to drugs and drug metabolism
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
    • C12Q2600/00—Oligonucleotides characterized by their use
    • C12Q2600/112—Disease subtyping, staging or classification
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
    • C12Q2600/00—Oligonucleotides characterized by their use
    • C12Q2600/118—Prognosis of disease development
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
    • C12Q2600/00—Oligonucleotides characterized by their use
    • C12Q2600/158—Expression markers

Definitions

  • This invention relates to breast cancer patient prognosis based on the gene expression profiles of patient biological samples.
  • lymph-node-negative (LNN) breast cancer patients are cured by local or regional treatment alone. Lancet (1998a ); and Lancet (1998b ). Guidelines have been developed to assist clinicians in selecting patients that should receive adjuvant therapy. Recommendations most widely used are the St. Gallen criteria (Goldhirsch et al. (2003)) and the National Institutes of Health (NIH) consensus criteria. Eifel et al. (2001). These guidelines indicate 85%-90% of LNN patients as candidates for adjuvant systemic therapy.
  • the present invention encompasses a method of assessing breast cancer status in a biological sample obtained from a breast cancer patient as defined in the claims.
  • the present invention encompasses a method of staging breast cancer in a biological sample obtained from a breast cancer patient as defined in the claims.
  • the present invention encompasses a method of determining breast cancer patient treatment protocol in a biological sample obtained from a breast cancer patient as defined in the claims.
  • the present disclosure provides a method of treating a breast cancer patient by obtaining a biological sample from a breast cancer patient; and measuring the expression levels in the sample of genes selected from those encoding mRNA: corresponding to SEQ ID NOs: 1-111; or recognized by the probe sets selected from psids corresponding to SEQ ID NOs: 1-111 as depicted in Table 10 where the gene expression levels above or below pre-determined cut-off levels are indicate a high risk of recurrence and; treating the patient with adjuvant therapy if they are a high risk patient.
  • the present disclosure provides a method of cross validating a prognostic gene expression profile for breast cancer patients by obtaining gene expression data from a statistically significant number of patient biological samples; randomizing sample order; setting aside data from about 10% - 50% of samples; computing, for the remaining samples, for factor of interest on all variables and selecting variables that meet a p-value cutoff (p); selecting variables that fit a prediction model using a forward search and evaluating the training error until it hits a predetermined error rate; testing the prediction model on the left-out 10-50% of samples; repeating steps c., -g. with a new set of samples removed; and continuing steps c) -g) until 100% of samples have been tested and record classification performance.
  • the present disclosure provides a method of independently validating a prognostic gene expression profile for breast patients by obtaining gene expression data from a statistically significant number of patient biological samples; normalizing the source variabilities in the gene expression data; computing for factor of interest on all variables that were selected previously; and testing the prediction model on the sample and record classification performance.
  • the present disclosure provides a method of generating a Relapse Hazard Score to enable prognosis of breast cancer patients by obtaining gene expression data from a statistically significant number of patient biological samples; applying univariate Cox's regression analysis to the data to obtain selected genes; applying weighted expression levels to the selected genes with standard Cox's coefficients to obtain a prediction model that can be applied as a relapse Hazard Score.
  • the present disclosure provides a method of generating a breast cancer prognostic patient report by obtaining a biological sample from the patient; measuring gene expression of the sample; applying a Relapse Hazard Score to the results of step b.; and using the results obtained in step c. to generate the report and patient reports generated thereby.
  • the present invention encompasses the use of a composition comprising a probe set consisting of : SEQ ID NOs: 96-111 in Table 10 in a method of diagnosis as defined in the claims.
  • the present invention encompasses the use of a kit for conducting an assay to determine breast cancer prognosis in a biological sample containing: materials for detecting isolated nucleic acid sequences, their complements, or portions thereof of a combination of genes selected from those encoding mRNA: identified by SEQ ID NOs: 1-111 in Table 10.
  • the present disclosure provides articles for assessing breast cancer status containing: materials for detecting isolated nucleic acid sequences, their complements, or portions thereof of a combination of genes selected from those encoding mRNA: corresponding to SEQ ID NOs: 96-111; or recognized by the probe sets corresponding to SEQ ID NOs: 96-111 as depicted in Table 10.
  • the present disclosure provides diagnostic/prognostic portfolio containing isolated nucleic acid sequences, their complements, or portions thereof of a combination of genes selected from those encoding mRNA: corresponding to SEQ ID NOs: 1-111; or recognized by the probe sets selected from psids corresponding to SEQ ID NOs: 1-111 as depicted in Table 10 where the combination is sufficient to characterize breast cancer status or risk of relapse in a biological sample.
  • the present invention encompasses a method of assessing breast cancer status in a biological sample obtained from a breast cancer patient as defined in the claims.
  • the present invention encompasses a method of staging breast cancer in a biological sample obtained from a breast cancer patient as defined in the claims.
  • the method utilizes any classification known in the art including the TNM system American Joint Committee on Cancer www.cancerstaging.org) and comparison to stages corresponding to patients with similar gene expression profiles.
  • the present invention encompasses a method of determining breast cancer patient treatment protocol in a biological sample obtained from a breast cancer patient as defined in the claims.
  • the present disclosure provides a method of treating a breast cancer patient by obtaining a biological sample from a breast cancer patient; and measuring the expression levels in the sample of genes selected from those encoding mRNA: corresponding to SEQ ID NOs: 1-111; or recognized by the probe sets selected from psids corresponding to SEQ ID NOs: 1-111 as depicted in Table 10 where the gene expression levels above or below pre-determined cut-off levels are indicate a high risk of recurrence and; treating the patient with adjuvant therapy if they are a high risk patient.
  • the SEQ ID NOs: are 36-95 for estrogen receptor (ER) patients and 96-111 for ER negative patients.
  • the sample can be prepared by any method known in the art including bulk tissue preparation and laser capture microdissection. Bulk tissue preparations can be obtained from a biopsy or a surgical specimen.
  • the above methods can further include measuring the expression level of at least one gene encoding mRNA identified by SEQ ID NOs: 112-132 in Table 10. They can also include measuring the expression level of at least one gene constitutively expressed in the sample.
  • the above methods can further include determining the estrogen receptor (ER) status of the sample.
  • ER status can be measured by any method known in the art including measuring the expression level of at least one gene indicative of ER status, measuring the presence of ER in the sample and measuring immunohistochemically.
  • the above methods can be used with samples from any biological source.
  • the sample is obtained from a primary tumor.
  • the above methods preferably have a specificity of at least 40% and a sensitivity of at least at least 90%.
  • the above methods can be used where the expression pattern of the genes is compared to an expression pattern indicative of a relapse patient.
  • the comparison can be by any method known in the art including comparison of expression patterns is conducted with pattern recognition methods.
  • Pattern recognition methods can be any known in the art including a Cox's proportional hazards analysis.
  • the pre-determined cut-off levels are at least 1.5-fold over- or under-expression in the sample relative to benign cells or normal tissue.
  • the pre-determined cut-off levels have at least a statistically significant p-value over-expression in the sample having metastatic cells relative to benign cells or normal tissue. More preferably, the p-value is less than 0.05.
  • microarray can be a cDNA array or an oligonucleotide array and can further contain one or more internal control reagents.
  • PCR polymerase chain reaction
  • RT-PCR reverse transcription polymerase chain reaction
  • the RT-PCR can further contain one or more internal control reagents.
  • gene expression is detected by measuring or detecting a protein encoded by the gene. Any method known in the art can be used including detection by an antibody specific to the protein and measuring a characteristic of the gene. Suitable characteristics include, without limitation, DNA amplification, methylation, mutation and allelic variation.
  • the present disclosure provides a method of cross validating a prognostic gene expression profile for breast cancer patients by obtaining gene expression data from a statistically significant number of patient biological samples; randomizing sample order; setting aside data from about 10% - 50% of samples; computing, for the remaining samples, for factor of interest on all variables and selecting variables that meet a p-value cutoff (p); selecting variables that fit a prediction model using a forward search and evaluating the training error until it hits a predetermined error rate; testing the prediction model on the left-out 10-50% of samples; repeating steps c., -g. with a new set of samples removed; and continuing steps c) -g) until 100% of samples have been tested and record classification performance.
  • the cross validation method can be used where the gene expression data obtained in step h. is represented by genes selected from those encoding mRNA: corresponding to SEQ ID NOs: 3, 4, 10, 18, 37, 40, 42, 43, 45, 55, 58, 64, 67, 72-74, 76, 81, 85-86, 89, 97, 100-101, 110-111, 125 and 132-442, or 2, 3, 5, 12, 20, 25, 36, 37, 39, 40, 41, 42, 43, 45, 46, 51, 52, 53, 54, 55, 57, 58, 59, 60, 61, 62, 63, 64, 66, 67, 69, 70, 72, 73, 74, 76, 80, 81, 83, 84, 85, 86, 87, 88, 89, 90, 94, 97, 98, 101, 102, 104, 107, 110, 111, 132, 139, 142, 150, 151, 153, 154, 158,
  • the present disclosure provides a method of independently validating a prognostic gene expression profile for breast patients by obtaining gene expression data from a statistically significant number of patient biological samples; normalizing the source variabilities in the gene expression data; computing for factor of interest on all variables that were selected previously; and testing the prediction model on the sample and record classification performance.
  • the independent validation method can be used where the gene expression data obtained in step d. is represented by genes selected from those encoding mRNA: corresponding to SEQ ID NOs: 3, 4, 10, 18, 37, 40, 42, 43, 45, 55, 58, 64, 67, 72-74, 76, 81, 85-86, 89, 97, 100-101, 110-111, 125 and 132-442, or 2, 3, 5, 12, 20, 25, 36, 37, 39, 40, 41, 42, 43, 45, 46, 51, 52, 53, 54, 55, 57, 58, 59, 60, 61, 62, 63, 64, 66, 67, 69, 70, 72, 73, 74, 76, 80, 81, 83, 84, 85, 86, 87, 88, 89, 90, 94, 97, 98, 101, 102, 104, 107, 110, 111, 132, 139, 142, 150, 151, 153, 154, 158,
  • the present disclosure provides a method of generating a Relapse Hazard Score to enable prognosis of breast cancer patients by obtaining gene expression data from a statistically significant number of patient biological samples; applying univariate Cox's regression analysis to the data to obtain selected genes; applying weighted expression levels to the selected genes with standard Cox's coefficients to obtain a prediction model that can be applied as a relapse Hazard Score.
  • I ⁇ 1 if X gene level > 10 0 if X gene level ⁇ 10
  • B are constants
  • w i is the standardized Cox regression coefficient for X gene + marker x i is the expression value of ER + marker in log2 scale
  • w j is the standardized Cox regression coefficient for X gene - marker x j is the expression value of ER - marker in log2 scale
  • X gene is selected from the group consisting of those encoding mRNA :
  • the present disclosure provides a method of generating a breast cancer prognostic patient report by obtaining a biological sample from the patient; measuring gene expression of the sample; applying a Relapse Hazard Score to the results of step b.; and using the results obtained in step c. to generate the report and patient reports generated thereby.
  • the report may contain an assessment of patient outcome and/or probability of risk relative to the patient population.
  • the present invention encompasses the use of a composition comprising a probe set consisting of: SEQ ID NOs: 96-111 in Table 10 in a method of diagnosis as defined in the claims.
  • the composition can contain at least one probe set selected from: SEQ ID NOs: 36-95; 96-111; or 36-111.
  • the composition can further contain reagents for conducting a microarray analysis, and a medium through which said nucleic acid sequences, their complements, or portions thereof are assayed.
  • the present invention encompasses the use of a kit for conducting an assay to determine breast cancer prognosis in a biological sample containing: materials for detecting isolated nucleic acid sequences, their complements, or portions thereof of a combination of genes encoding mRNA: identified SEQ ID NOs: 1-111 in Table 10.
  • the kit can further contain reagents for conducting a microarray analysis, and a medium through which said nucleic acid sequences, their complements, or portions thereof are assayed.
  • the present disclosure provides articles for assessing breast cancer status containing: materials for detecting isolated nucleic acid sequences, their complements, or portions thereof of a combination of genes selected from those encoding mRNA: corresponding to SEQ ID NOs: 1-111; or recognized by the probe sets selected from psids corresponding to SEQ ID NOs: 1-111 as depicted in Table 10.
  • the articles can further contain reagents for conducting a microarray analysis, and a medium through which said nucleic acid sequences, their complements, or portions thereof are assayed.
  • microarrays provided herein can contain isolated nucleic acid sequences, their complements, or portions thereof of a combination of genes selected from those encoding mRNA: corresponding to SEQ ID NOs: 1-111; or recognized by the probe sets selected from of psids corresponding to SEQ ID NOs: 1-111 as depicted in Table 10 where the combination is sufficient to characterize breast cancer status or risk of relapse in a biological sample.
  • the microarray measurement or characterization is preferably at least 1.5-fold over- or under-expression.
  • the microarray can detect a pre-determined cut-off levels are at least 1.5-fold over- or under- expression in the sample relative to benign cells or normal tissue.
  • the pre-determined cut-off levels have at least a statistically significant p-value over-expression in the sample having metastatic cells relative to benign cells or normal tissue. More preferably, the p-value is less than 0.05.
  • the present disclosure provides a diagnostic/prognostic portfolio containing isolated nucleic acid sequences, their complements, or portions thereof of a combination of genes selected from those encoding mRNA: corresponding to SEQ ID NOs: 1-111; or recognized by the probe sets selected from psids corresponding to SEQ ID NOs: 1-111 as depicted in Table 10 where the combination is sufficient to characterize breast cancer status or risk of relapse in a biological sample.
  • the portfolio can detect a pre-determined cut-off levels are at least 1.5-fold over- or under- expression in the sample relative to benign cells or normal tissue.
  • the pre-determined cut-off levels have at least a statistically significant p-value over-expression in the sample having metastatic cells relative to benign cells or normal tissue. More preferably, the p-value is less than 0.05.
  • SEQ ID NOs: 1-650 are summarized in Table 10.
  • the marker is identified by a psid or Affymetrix GeneChip Designation and represents the gene encoding any variant, allele etc. corresponding to the given SEQ ID NO.
  • the marker is also defined as the gene encoding mRNA recognized by the probe corresponding to the given psid. Certain markers are described in more detail below.
  • M83, SEQ ID NO: 45 is mentioned by US patent application publication numbers 20020110547 ; 20040009491 ; and 20030236392 , and PCT publication numbers WO0149716 ; WO0170979 ; WO03025138 ; WO03042661 ; WO03016475 ; WO2004063355 ; WO2004047728 ; and WO2004030615 .
  • ABLIM-s SEQ ID NO: 43, is mentioned by US patent application publication numbers 20020131971 ; 20030087818 ; 20030166064 ; 20030236392 ; and 20040005560 and PCT publication numbers WO0036107 ; WO0159063 ; WO0160860 ; WO0174405 ; WO0177288 ; WO02059271 ; WO0212328 ; WO0224956 ; WO0229086 ; WO03025138 ; WO2004024097 ; WO2004037996 ; WO2004039956 ; WO2004043361 ; and WO2004047728 .
  • SEQ ID NO: 54 is mentioned by US patent application publication numbers 20020064872 ; 20020085998 ; 20020150581 ; 20020156011 ; 20020192678 ; 20030069180 ; 20030073623 ; 20030104366 ; 20040005560 ; 20040013663 ; and 20040058340 and PCT publication numbers WO0060076 ; WO0142467 ; WO0155322 ; WO0160860 ; WO0170979 ; WO0179286 ; WO196388 ; WO02057414 ; WO02059377 ; WO02060317 ; WO02086443 ; WO0231198 ; WO0250279 ; WO03004989 ; WO03025138 ; WO03042661 ; WO03062379 ; WO2004047728 ; WO2004048938 ; WO2004048938 ; WO2004063355 ; and
  • C11ORF9, SEQ ID NO: 48 is mentioned by US patent application publication numbers 20030065157 ; and 20030073623 and PCT publication numbers WO0056880 ; WO0058473 ; WO0159063 ; WO0174405 ; WO02059260 ; WO0229086 ; WO03101283 ; WO2004031413 ; and WO2004060270 .
  • C3, SEQ ID NO: 46 is mentioned by US patent application publication numbers 20040005560 ; and 20040058340 and PCT publication numbers WO9101999 ; WO0055350 ; WO0160860 ; WO0175067 ; WO0188088 ; WO0224956 ; WO0294629 ; WO03078572 ; WO2004028479 ; WO2004030615 ; WO2004041170 ; and WO2004060270 .
  • CGI-41 SEQ ID NO: 65
  • US patent application publication numbers 20030073623 and 20030096982 and PCT publication numbers WO9514772 ; WO9940100 ; WO0154472 ; WO0157188 ; WO03046152 ; WO2004060270 .
  • CLN8, SEQ ID NO: 36 is mentioned by EP 1 104 808 B1 , US patent application numbers 20030073623 ; and 20040009491 and PCT publication numbers WO9845437 ; WO9935158 ; WO0142451 ; WO0190304 ; WO02090526 ; WO02095010 ; WO02102993 ; WO02102994 ; WO03004622 ; WO04024892 ; and WO04041170 .
  • CNK1 SEQ ID NO: 60
  • US patent application publication number 20040058340 and PCT publication numbers WO9938972 ; and WO2004037996 .
  • DUSP4, SEQ ID NO: 57 is mentioned by US patent application publication numbers 20030073623 ; 20030194704 ; 20040058340 ; and 20040110194 and PCT publication numbers WO0100828 ; WO0204514 ; WO02059377 ; WO02103320 ; WO0224956 ; WO03004989 ; WO2004018641 ; WO2004023973 ; WO2004037996 ; WO2004039956 ; WO2004043361 ; WO2004047728 ; WO2004048938 ; and WO9423039 .
  • FEN1 SEQ ID NO: 62
  • US patent number 5874283 US patent application publication numbers 20020156011 ; 20030069180 ; 20030073623 ; and 20030194704 and PCT publication numbers WO0196388 ; WO03016475 ; WO03016500 ; WO03072035 ; WO03101283 ; WO2004022059 ; WO2004030615 ; WO2004039956 ; WO2004043361 ; WO2004047728 ; WO2004048938 ; WO2004060270 ; and WO2004079014 .
  • FKBP2 SEQ ID NO: 63
  • GP73 SEQ ID NO: 37, is mentioned by US patent application publication numbers 20030022239 ; 20030073623 ; 20030236392 ; 20040009478 ; 20040034196 ; and 20040058340 and PCT publication numbers WO0012708 ; WO0061610 ; WO0078961 ; WO0140466 ; WO0160860 ; WO0177168 ; WO0194629 ; WO02059260 ; WO02083876 ; WO0224956 ; WO03004989 ; WO2004024892 ; WO2004031414 ; and WO2004053081 .
  • H4FH SEQ ID NO: 61
  • US patent application publication number 20020151681 and PCT publication numbers WO0055174 ; WO0175067 ; WO0224956 ; WO03016476 ; WO2004039943 .
  • IL-18, SEQ ID NO: 39 is mentioned by US patent number 6060283 , US patent application publication number 20040115636 and PCT publication numbers WO0194629 ; WO02057414 ; WO0224956 ; WO0229086 ; WO03025138 ; WO03042661 ; and WO9724441 .
  • KIAA0748, SEQ ID NO: 56 is mentioned by PCT publication numbers WO0021991 ; WO02094988 ; and WO2004003162 .
  • KPNA2 SEQ ID NO: 64
  • MGC11335 SEQ ID NO: 66
  • US patent application publication numbers 20030073623 ; 20030219744 ; and 20030236392 PCT publication numbers WO0144448 ; WO0153312 ; WO0157182 ; WO0188088 ; and WO2004030615 .
  • OR12D2 SEQ ID NO: 52, is mentioned by PCT publication numbers WO0127158 ; WO02068652 ; WO02081498 ; WO02081517 ; WO030000735 ; and WO03091388 .
  • ORC3 SEQ ID NO: 53, is mentioned by US patent application publication number 20040013663 and PCT publication numbers WO9810067 ; WO9958642 ; WO0060078 ; WO0175067 ; WO02059377 ; WO02070737 ; WO02102235 ; and WO03042661 .
  • PLK1, SEQ ID NO: 59 is mentioned by DE4329177 , US patent application publication numbers 20020081659 ; and 20020151681 and PCT publication numbers WO0055174 ; WO0055320 ; WO02070737 ; WO02086443 ; WO0224956 ; WO03003906 ; WO03016476 ; WO03018807 ; WO03025138 ; WO03042661 ; WO2004030615 ; WO2004037996 ; WO2004042022 ; WO2004047728 ; WO2004048938 ; WO2004063355 ; and WO2004070062 .
  • PPP1CC SEQ ID NO: 42
  • SMC4, SEQ ID NO: 55 is mentioned by US patent application publication numbers 20020123619 ; 20020168637 ; and 20040058340 and PCT publication numbers WO9938972 ; WO9964576 ; WO0175067 ; WO0190154 ; WO0204514 ; WO02059377 ; WO02074237 ; WO02086443 ; WO02102235 ; WO03003906 ; WO03016475 ; WO03025138 ; WO03042661 ; WO2003094848 ; WO0004024892 ; WO2004047728 ; WO2004048938 ; WO2004063355 ; and WO2004074301 .
  • TRDL-1 SEQ ID NO: 44
  • US patent numbers 6171787 ; and 6440694 US patent application publication numbers 20020055474 ; 20020072089 ; 20020081659 ; 20030065157 ; 20030073623 ; and 20030219767 and PCT publication numbers WO9733902 ; WO9912965 ; WO9926976 ; WO9928462 ; WO9933980 ; WO9935170 ; WO9950416 ; WO9954460 ; WO0026244 ; WO0032776 ; WO0055320 ; WO0125256 ; WO0177291 ; WO2004020593 ; WO2004024892 ; WO2004033637 ; and 04037996 .
  • Yif1p, SEQ ID NO: 38 is mentioned by US patent application publication numbers 20020131971 ; 20030166064 ; and 20040037842 and PCT publication numbers WO9933981 ; WO9947540 ; WO0173027 ; WO02060317 ; WO02070737 ; WO02076488 ; WO02095010 ; WO0224956 ; WO03004622 ; WO03038063 ; WO03042661 ; WO03054152 ; WO03064589 ; WO2004024892 ; WO2004037996 ; WO2004047728 ; and WO2004048938 .
  • nucleic acid sequences having the potential to express proteins, peptides, or mRNA such sequences referred to as "genes" within the genome by itself is not determinative of whether a protein, peptide, or mRNA is expressed in a given cell. Whether or not a given gene capable of expressing proteins, peptides, or mRNA does so and to what extent such expression occurs, if at all, is determined by a variety of complex factors.
  • assaying gene expression can provide useful information about the occurrence of important events such as tumorogenesis, metastasis, apoptosis, and other clinically relevant phenomena. Relative indications of the degree to which genes are active or inactive can be found in gene expression profiles.
  • the gene expression profiles of this invention are used to provide a prognosis and treat patients for breast cancer.
  • Sample preparation requires the collection of patient samples.
  • Patient samples used in the inventive method are those that are suspected of containing diseased cells such as epithelial cells taken from the primary tumor in a breast sample. Samples taken from surgical margins are also preferred. Most preferably, however, the sample is taken from a lymph node obtained from a breast cancer surgery. Laser Capture Microdissection (LCM) technology is one way to select the cells to be studied, minimizing variability caused by cell type heterogeneity. Consequently, moderate or small changes in gene expression between normal and cancerous cells can be readily detected. Samples can also comprise circulating epithelial cells extracted from peripheral blood. These can be obtained according to a number of methods but the most preferred method is the magnetic separation technique described in U.S. Patent 6,136,182 . Once the sample containing the cells of interest has been obtained, RNA is extracted and amplified and a gene expression profile is obtained, preferably via micro-array, for genes in the appropriate portfolios.
  • LCM Laser Capture Microdissection
  • Preferred methods for establishing gene expression profiles include determining the amount of RNA that is produced by a gene that can code for a protein or peptide. This is accomplished by reverse transcriptase PCR (RT-PCR), competitive RT-PCR, real time RT-PCR, differential display RT-PCR, Northern Blot analysis and other related tests. While it is possible to conduct these techniques using individual PCR reactions, it is best to amplify complementary DNA (cDNA) or complementary RNA (cRNA) produced from mRNA and analyze it via microarray. A number of different array configurations and methods for their production are known to those of skill in the art and are described in U.S.
  • Patents such as: 5,445,934 ; 5,532,128 ; 5,556,752 ; 5,242,974 ; 5,384,261 ; 5,405,783 ; 5,412,087 ; 5,424,186 ; 5,429,807 ; 5,436,327 ; 5,472,672 ; 5,527,681 ; 5,529,756 ; 5,545,531 ; 5,554,501 ; 5,561,071 ; 5,571,639 ; 5,593,839 ; 5,599,695 ; 5,624,711 ; 5,658,734 ; and 5,700,637 .
  • Microarray technology allows for the measurement of the steady-state mRNA level of thousands of genes simultaneously thereby presenting a powerful tool for identifying effects such as the onset, arrest, or modulation of uncontrolled cell proliferation.
  • Two microarray technologies are currently in wide use. The first are cDNA arrays and the second are oligonucleotide arrays. Although differences exist in the construction of these chips, essentially all downstream data analysis and output are the same.
  • the product of these analyses are typically measurements of the intensity of the signal received from a labeled probe used to detect a cDNA sequence from the sample that hybridizes to a nucleic acid sequence at a known location on the microarray.
  • the intensity of the signal is proportional to the quantity of cDNA, and thus mRNA, expressed in the sample cells.
  • mRNA mRNA
  • Analysis of expression levels is conducted by comparing signal intensities. This is best done by generating a ratio matrix of the expression intensities of genes in a test sample versus those in a control sample. For instance, the gene expression intensities from a diseased tissue can be compared with the expression intensities generated from normal tissue of the same type (e.g., diseased breast tissue sample vs. normal breast tissue sample). A ratio of these expression intensities indicates the fold-change in gene expression between the test and control samples.
  • Gene expression profiles can also be displayed in a number of ways. The most common method is to arrange raw fluorescence intensities or ratio matrix into a graphical dendogram where columns indicate test samples and rows indicate genes. The data are arranged so genes that have similar expression profiles are proximal to each other. The expression ratio for each gene is visualized as a color. For example, a ratio less than one (indicating down-regulation) may appear in the blue portion of the spectrum while a ratio greater than one (indicating up-regulation) may appear as a color in the red portion of the spectrum.
  • Commercially available computer software programs are available to display such data including GeneSpring from Agilent Technologies and Partek Discover TM and Partek Infer TM software from Partek®.
  • Modulated genes used in the methods of the invention are described in the Examples. Differentially expressed genes are either up- or down-regulated in patients with a relapse of breast cancer relative to those without a relapse. Up regulation and down regulation are relative terms meaning that a detectable difference (beyond the contribution of noise in the system used to measure it) is found in the amount of expression of the genes relative to some baseline. In this case, the baseline is the measured gene expression of a non-relapsing patient. The genes of interest in the diseased cells (from the relapsing patients) are then either up- or down-regulated relative to the baseline level using the same measurement method.
  • Diseased in this context, refers to an alteration of the state of a body that interrupts or disturbs, or has the potential to disturb, proper performance of bodily functions as occurs with the uncontrolled proliferation of cells.
  • someone is diagnosed with a disease when some aspect of that person's genotype or phenotype is consistent with the presence of the disease.
  • the act of conducting a diagnosis or prognosis includes the determination of disease/status issues such as determining the likelihood of relapse and therapy monitoring.
  • therapy monitoring clinical judgments are made regarding the effect of a given course of therapy by comparing the expression of genes over time to determine whether the gene expression profiles have changed or are changing to patterns more consistent with normal tissue.
  • levels of up- and down-regulation are distinguished based on fold changes of the intensity measurements of hybridized microarray probes.
  • a 2.0 fold difference is preferred for making such distinctions (or a p-value less than 0.05). That is, before a gene is said to be differentially expressed in diseased/relapsing versus normal/non-relapsing cells, the diseased cell is found to yield at least 2 times more, or 2 times less intensity than the normal cells. The greater the fold difference, the more preferred is use of the gene as a diagnostic or prognostic tool.
  • Genes selected for the gene expression profiles of the instant invention have expression levels that result in the generation of a signal that is distinguishable from those of the normal or non-modulated genes by an amount that exceeds background using clinical laboratory instrumentation.
  • Statistical values can be used to confidently distinguish modulated from non-modulated genes and noise. Statistical tests find the genes most significantly different between diverse groups of samples.
  • the Student's T-test is an example of a robust statistical test that can be used to find significant differences between two groups. The lower the p-value, the more compelling the evidence that the gene is showing a difference between the different groups. Nevertheless, since microarrays measure more than one gene at a time, tens of thousands of statistical tests may be performed at one time. Because of this, one is unlikely to see small p-values just by chance and adjustments for this using a Sidak correction as well as a randomization/permutation experiment can be made. A p-value less than 0.05 by the T-test is evidence that the gene is significantly different.
  • More compelling evidence is a p-value less then 0.05 after the Sidak correction is factored in. For a large number of samples in each group, a p-value less than 0.05 after the randomization/permutation test is the most compelling evidence of a significant difference.
  • Another parameter that can be used to select genes that generate a signal that is greater than that of the non-modulated gene or noise is the use of a measurement of absolute signal difference.
  • the signal generated by the modulated gene expression is at least 20% different than those of the normal or non-modulated gene (on an absolute basis). It is even more preferred that such genes produce expression patterns that are at least 30% different than those of normal or non-modulated genes.
  • Genes can be grouped so that information obtained about the set of genes in the group provides a sound basis for making a clinically relevant judgment such as a diagnosis, prognosis, or treatment choice. These sets of genes make up the portfolios of the invention. In this case, the judgments supported by the portfolios involve breast cancer and its chance of recurrence. As with most diagnostic markers, it is often desirable to use the fewest number of markers sufficient to make a correct medical judgment. This prevents a delay in treatment pending further analysis as well inappropriate use of time and resources.
  • portfolios are established such that the combination of genes in the portfolio exhibit improved sensitivity and specificity relative to individual genes or randomly selected combinations of genes.
  • the sensitivity of the portfolio can be reflected in the fold differences exhibited by a gene's expression in the diseased state relative to the normal state.
  • Specificity can be reflected in statistical measurements of the correlation of the signaling of gene expression with the condition of interest. For example, standard deviation can be a used as such a measurement. In considering a group of genes for inclusion in a portfolio, a small standard deviation in expression measurements correlates with greater specificity. Other measurements of variation such as correlation coefficients can also be used.
  • One method of establishing gene expression portfolios is through the use of optimization algorithms such as the mean variance algorithm widely used in establishing stock portfolios. This method is described in detail in US patent publication number 20030194734 . Essentially, the method calls for the establishment of a set of inputs (stocks in financial applications, expression as measured by intensity here) that will optimize the return (e.g., signal that is generated) one receives for using it while minimizing the variability of the return. Many commercial software programs are available to conduct such operations. "Wagner Associates Mean-Variance Optimization Application,” referred to as “Wagner Software” throughout this specification, is preferred. This software uses functions from the “Wagner Associates Mean-Variance Optimization Library" to determine an efficient frontier and optimal portfolios in the Markowitz sense is preferred. Use of this type of software requires that microarray data be transformed so that it can be treated as an input in the way stock return and risk measurements are used when the software is used for its intended financial analysis purposes.
  • the process of selecting a portfolio can also include the application of heuristic rules.
  • such rules are formulated based on biology and an understanding of the technology used to produce clinical results. More preferably, they are applied to output from the optimization method.
  • the mean variance method of portfolio selection can be applied to microarray data for a number of genes differentially expressed in subjects with breast cancer. Output from the method would be an optimized set of genes that could include some genes that are expressed in peripheral blood as well as in diseased tissue. If samples used in the testing method are obtained from peripheral blood and certain genes differentially expressed in instances of breast cancer are differentially expressed in peripheral blood, then a heuristic rule can be applied in which a portfolio is selected from the efficient frontier excluding those that are differentially expressed in peripheral blood.
  • the rule can be applied prior to the formation of the efficient frontier by, for example, applying the rule during data pre-selection.
  • heuristic rules can be applied that are not necessarily related to the biology in question. For example, one can apply a rule that only a prescribed percentage of the portfolio can be represented by a particular gene or group of genes.
  • Commercially available software such as the Wagner Software readily accommodates these types of heuristics. This can be useful, for example, when factors other than accuracy and precision (e.g., anticipated licensing fees) have an impact on the desirability of including one or more genes.
  • One method of the invention involves comparing gene expression profiles for various genes (or portfolios) to ascribe prognoses.
  • the gene expression profiles of each of the genes comprising the portfolio are fixed in a medium such as a computer readable medium.
  • a medium such as a computer readable medium.
  • This can take a number of forms. For example, a table can be established into which the range of signals (e.g., intensity measurements) indicative of disease is input. Actual patient data can then be compared to the values in the table to determine whether the patient samples are normal or diseased.
  • patterns of the expression signals e.g., fluorescent intensity
  • the gene expression patterns from the gene portfolios used in conjunction with patient samples are then compared to the expression patterns.
  • Pattern comparison software can then be used to determine whether the patient samples have a pattern indicative of recurrence of the disease. Of course, these comparisons can also be used to determine whether the patient is not likely to experience disease recurrence.
  • the expression profiles of the samples are then compared to the portfolio of a control cell. If the sample expression patterns are consistent with the expression pattern for recurrence of a breast cancer then (in the absence of countervailing medical considerations) the patient is treated as one would treat a relapse patient. If the sample expression patterns are consistent with the expression pattern from the normal/control cell then the patient is diagnosed negative for breast cancer.
  • the preferred profiles of this disclosure are the 35-gene portfolio made up of the genes of SEQ ID NOs: 1-35, the 60-gene portfolio made up of the genes of SEQ ID NOs: 36-95 which is best used to prognosticate ER-positive patients, and the 16-gene portfolio made up of genes of SEQ ID NOs: 96-111 which is best used to prognosticate ER-negative patients. Most preferably, the portfolio is made up of genes of SEQ ID NOs: 36-111. This most preferred portfolio best segregates breast cancer patients irrespective of ER status at high risk of relapse from those who are not. Once the high-risk patients are identified they can then be treated with adjuvant therapy.
  • the most preferred method for analyzing the gene expression pattern of a patient to determine prognosis of breast cancer is through the use of a Cox's hazard analysis program.
  • the analysis is conducted using S-Plus software (commercially available from Insightful Corporation).
  • S-Plus software commercially available from Insightful Corporation.
  • a gene expression profile is compared to that of a profile that confidently represents relapse (i.e., expression levels for the combination of genes in the profile is indicative of relapse).
  • the Cox's hazard model with the established threshold is used to compare the similarity of the two profiles (known relapse versus patient) and then determines whether the patient profile exceeds the threshold.
  • the patient is classified as one who will relapse and is accorded treatment such as adjuvant therapy. If the patient profile does not exceed the threshold then they are classified as a non-relapsing patient.
  • Other analytical tools can also be used to answer the same question such as, linear discriminate analysis, logistic regression and neural network approaches.
  • the gene expression profiles of this invention can also be used in conjunction with other non-genetic diagnostic methods useful in cancer diagnosis, prognosis, or treatment monitoring.
  • diagnostic power of the gene expression based methods described above with data from conventional markers such as serum protein markers (e.g., Cancer Antigen 27.29 ("CA 27.29”)).
  • serum protein markers e.g., Cancer Antigen 27.29 (“CA 27.29”).
  • CA 27.29 Cancer Antigen 27.29
  • blood is periodically taken from a treated patient and then subjected to an enzyme immunoassay for one of the serum markers described above. When the concentration of the marker suggests the return of tumors or failure of therapy, a sample source amenable to gene expression analysis is taken.
  • FNA fine needle aspirate
  • Articles include representations of the gene expression profiles useful for treating, diagnosing, prognosticating, and otherwise assessing diseases. These profile representations are reduced to a medium that can be automatically read by a machine such as computer readable media (magnetic, optical, and the like).
  • the articles can also include instructions for assessing the gene expression profiles in such media.
  • the articles may comprise a CD ROM having computer instructions for comparing gene expression profiles of the portfolios of genes described above.
  • the articles may also have gene expression profiles digitally recorded therein so that they may be compared with gene expression data from patient samples. Alternatively, the profiles can be recorded in different representational format. A graphical recordation is one such format. Clustering algorithms such as those incorporated in Partek DiscoverTM and Partek InferTM software from Partek® mentioned above can best assist in the visualization of such data.
  • articles of manufacture are media or formatted assays used to reveal gene expression profiles. These can comprise, for example, microarrays in which sequence complements or probes are affixed to a matrix to which the sequences indicative of the genes of interest combine creating a readable determinant of their presence.
  • articles according to the disclosure can be fashioned into reagent kits for conducting hybridization, amplification, and signal generation indicative of the level of expression of the genes of interest for detecting breast cancer.
  • Kits made according to the invention include formatted assays for determining the gene expression profiles. These can include all or some of the materials needed to conduct the assays such as reagents and instructions.
  • Genes analyzed according to this invention are typically related to full-length nucleic acid sequences that code for the production of a protein or peptide.
  • identification of full-length sequences is not necessary from an analytical point of view. That is, portions of the sequences or ESTs can be selected according to well-known principles for which probes can be designed to assess gene expression for the corresponding gene.
  • Frozen tumor specimens from LNN patients treated during 1980-1995, but untreated with systemic neoadjuvant therapy were selected from our tumor bank at the Erasmus Medical Center (Rotterdam, Netherlands). All tumor samples were submitted to our reference laboratory from 25 regional hospitals for steroid hormone receptor measurements. The guidelines for primary treatment were similar for all hospitals. Tumors were selected in a manner to avoid bias. On the assumption of a 25-30% in 5 years, and a substantial loss of tumors because of quality control reasons, 436 invasive tumor samples were processed. Patients with a poor, intermediate, and good clinical outcome were included. Samples were rejected based on insufficient tumor content (53), poor RNA quality (77) or poor chip quality (20) leaving 286 samples eligible for further analysis.
  • the study protocol was approved by institutional medical ethics committee (MEC no. 02.953). Median age of patients at the time of surgery (breast conserving surgery: 219 patients; modified radical mastectomy: 67 patients) was 52 years (range, 26-83 years). Radiotherapy was given to 248 patients (87%) according to our institutional protocol. The proportions of patients who underwent breast conserving therapy and radiotherapy are normal for LNN disease. Patients were included regardless of radiotherapy status, as this study was not aimed to investigate the potential effects of a specific type of surgery or adjuvant radiotherapy. Furthermore, studies have shown that radiotherapy has no clear effect on distant disease recurrence. Early Breast Cancer Trialists (1995). Lymph node negativity was based on pathological examination by regional pathologists. Foekens et al. (1989a).
  • ER (and PgR) levels were measured by ligand binding assay or enzyme immunoassay (EIA) (Foekens et al. (1989b)) or by immunohistochemistry (in 9 tumors).
  • EIA enzyme immunoassay
  • the cutoff values used to classify patients as positive or negative for ER and PR was 10fmol/mg protein or 10% positive tumor cells.
  • Postoperative follow-up involved examination every 3 months during the first 2 years, every 6 months for years 3 to 5, and every 12 months from year 5.
  • the date of diagnosis of metastasis was defined as the date of confirmation of metastasis after symptoms reported by the patient, detection of clinical signs, or at regular follow-up.
  • the median follow-up period of surviving patients was 101 months (range, 20-171).
  • 93 33%) showed evidence of distant metastasis within 5 years and were counted as failures in the analysis of distant metastasis-free survival (DMFS).
  • Eighty-three patients (29%) died after a previous relapse. Therefore, a total of 88 patients (31%) were failures in the analysis of overall survival (OS).
  • OS overall survival
  • Gene expression data was filtered to include genes called "present" in two or more samples. 17,819 genes passed this filter and were used for hierarchical clustering. Before clustering, the expression level of each gene was divided by its median expression level in the patients. This standardization step limited the effect of the magnitude of expression of genes, and grouped together genes with similar patterns of expression in the clustering analysis. To identify patient subgroups, we carried out average linkage hierarchical clustering on both the genes and the samples using GeneSpring 6 ⁇ 0.
  • Each patient subgroup was analyzed separately in order to select markers.
  • the patients in the ER-positive subgroup were randomly allocated into training and testing sets of 80 and129 patients, respectively.
  • the patients in the ER-negative subgroup were randomly divided into training and testing sets of 35 and 42 patients, respectively.
  • the markers selected from each subgroup training set were combined to form a single signature to predict tumor metastasis for both ER-positive and ER-negative patients in a subsequent independent validation.
  • the sample size of the training set was determined by a resampling method to ensure its statistical confidence level. Briefly, the number of patients in the training set started at 15 patients and was increased by steps of 5. For a given sample size, 10 training sets with randomly selected patients were made. A gene signature was constructed from each of training sets and then tested in a designated testing set of patients by analysis of receiver operating characteristic (ROC) curve with distant metastasis within 5 years as the defining point. The mean and the coefficient of variation (CV) of the area under the curve (AUC) for a given sample size were calculated. A minimum number of patients required for the training set were chosen at the point that the average AUC reached a plateau and the CV of the 10 AUC was below 5%.
  • ROC receiver operating characteristic
  • Genes were selected as follows. First, univariate Cox's proportional hazards regression was used to identify genes for which expression (on log 2 scale) was correlated with the length of DMFS. To reduce the effect of multiple testing and to test the robustness of the selected genes, the Cox's model was constructed with bootstrapping of the patients in the training set. Efron et al. (1981). Briefly, 400 bootstrap samples of the training set were constructed, each with 80 patients randomly chosen with replacement. A Cox's model was run on each of the bootstrap samples. A bootstrap score was created for each gene by removing the top and bottom 5% p-values and then averaging the inverses of the remaining bootstrap p-values. This score was used to rank the genes.
  • I ⁇ 1 if ER level > 10 fmol per mg protein 0 if ER level ⁇ 10 fmol per mg protein
  • B are constants
  • w i is the standardized Cox's regression coefficient for ER + marker x i is the expression value of ER + marker on a log2 scale
  • w j is the standardized Cox's regression coefficient for ER - marker x j is the expression value of ER - marker on a log2 scale
  • the threshold was determined from the ROC curve of the training set to ensure 100% sensitivity and the highest specificity.
  • the values of constants A of 313.5 and B of 280 were chosen to center the threshold of RS to zero for both ER-positive and ER-negative patients.
  • Patients with positive RS scores were classified into the poor prognosis group and patients with negative RS scores were classified into the good prognosis group.
  • the gene signature and the cutoff were validated in the testing set.
  • a functional class was assigned to each of the genes in the prognostic signature gene. Pathway analysis was done with Ingenuity 1.0 software (Ingenuity Systems, CA). Affymetrix probes were used as input to search for biological networks built by the software. Biological networks identified by the program were assessed in the context of general functional classes by GO ontology classification. Pathways with two or more genes in the prognostic signature were selected and evaluated.
  • Table 1 Clinical and pathological features of the 286 patients are summarized in Table 1.
  • Table 1 Clinical and Pathological Characteristics of Patients and Their Tumors Characteristics All patients (%) ER-positive training set (%) ER-negative training set (%) Validation set (%) Number 286 80 35 171 Age (mean ⁇ SD) 54 ⁇ 12 54 ⁇ 13 54 ⁇ 13 54 ⁇ 12 ⁇ 40 yr 36 (13) 12(15) 3 (9) 21 (12) 41-55 yr 129(45) 30(38) 17(49) 82 (48) 56-70 yr 89 (31) 28(35) 11(31) 50 (29) >70 yr 32 (11) 1 (13) 4 (11) 18 (11) Menopausal status Premenopausal 139(49) 39(49) 16(46) 84 (49) Postmenopausal 147(51) 41(51) 19(54) 87 (51) T stage T1 146(51) 38(48) 14(40) 94 (55) T2 132(46) 41(51
  • the ER-negative training group had a slightly higher proportion of larger tumors and, as expected, more poor grade tumors than the ER-positive training group.
  • the validation group of 171 patients did not differ from the total group of 286 patients with respect to any of the patients or tumor characteristics.
  • Each subgroup was analyzed in order to select markers. Seventy-six genes were selected from patients in the training sets (60 for the ER-positive group, 16 for the ER-negative group) ( Fig. 2A , left ). With the selected genes and ER status taken together, a Cox's model to predict recurrence of cancer was built for all LNN patients. Validation of the 76-gene predictor in the 171 patient testing set produced an ROC with an AUC value of 0.694, sensitivity of 93% (52/56), and specificity of 48% (55/115) ( Fig. 2A , right).
  • DMFS distant metastasis free survival
  • OS overall survival
  • the 76-gene profile also represented a strong prognostic factor for the development of distant metastasis in the subgroups of 84 premenopausal patients (HR: 9.60), 87 postmenopausal patients (HR: 4.04) and 79 patients with tumor sizes of 10 to 20 mm (HR: 14.1) ( Fig. 3 ).
  • Table 3 Univariate and multivariable Cox's regression analyses are summarized in Table 3.
  • Table 3 Uni- and multivariable analyses for DMFS in the testing set of 171 LNN patients
  • Genes implicated in disease progression were found including calpain2, origin recognition protein, dual specificity phosphatases, Rho-GDP dissociation inhibitor, TNF superfamily protein, complement component 3, microtubule-associated protein, protein phosphatase 1 and apoptosis regulator BCL-G. Furthermore, previously characterized prognostic genes such as cyclin E2 (Keyomarsi et al. (2002)) and CD44 (Herrera-Gayol et al. (1999)) were in the gene signature.
  • this prognostic signature will yield a positive predictive value of 37% and a negative predictive value of 95%, on the assumption of a 25% rate of disease recurrence in LNN patients.
  • this signature can be valuable for defining the risk of recurrence for the increasing proportion of T1 tumors ( ⁇ 2 cm).
  • Comparison with the St Gallen and NIH guidelines was instructive. Although ensuring the same number of the high-risk patients would receive the necessary treatment, our 76-gene signature would recommend systemic adjuvant chemotherapy to only 52% of the low-risk patients, as compared to 90% and 89% by the St. Gallen and NIH guidelines, respectively (Table 6). Table 6.
  • the 76-gene signature can thus result in a reduction of the number of low-risk LNN patients who would be recommended to have unnecessary adjuvant systemic therapy.
  • the 76-genes in the prognostic signature belong to many functional classes, suggesting that different paths could lead to disease progression.
  • the signature included well-characterized genes and 18 unknown genes. This finding could explain the superior performance of this signature as compared to other prognostic factors.
  • genes involved in cell death, cell proliferation, and transcriptional regulation were found in both patient groups stratified by ER status, the 60 genes selected for the ER-positive group and the 16 genes selected for the ER-negative group had no overlap. This result supports the idea that the extent of heterogeneity and the underlying mechanisms for disease progression could differ for the two ER-based subgroups of breast cancer patients.
  • van de Vijver et al. included both node-negative and node-positive patients, who had or had not received adjuvant systemic therapy, and only women younger than 53 years. Furthermore, the microarray platforms used in the studies are different, Affymetrix vs. Agilent. Of the 70 genes of the van't Veer (2002) study, only 48 are present on the Affymetrix U133a array, while of our 76 genes only 38 are present on the Agilent array. There is a 3-gene overlap between the two signatures (cyclin E2, origin recognition complex, and TNF superfamily protein). Despite the apparent difference, both signatures included genes that identified several common pathways that might be involved in tumor recurrence. This finding supports the idea that while there might be redundancy in gene members, effective signatures could be required to include representation of specific pathways.
  • estrogen receptor is an indicator for (adjuvant) tamoxifen treatment and is associated with patient outcomes.
  • LCM laser capture microdissection
  • RNA samples were collected from 29 lymph-node-negative breast cancer patients (for tumor characteristics, Table 2) who had been surgically treated for a breast tumor and had not received neoadjuvant systemic therapy.
  • H&E slide For each patient tissue sample, we first used the H&E slide to evaluate the cell morphology.
  • RNA was isolated from both tumor cells obtained by LCM (PALM) performed on cryostat sections and from whole cryostat sections, i.e., bulk tissue of the same tumor.
  • RNA sample quality was analyzed by an Agilent BioAnalyzer. The RNA samples were hybridized to Affymetrix human U133A chip that contains approximately 22,000 probe sets. The fluorescence was quantified and the intensities were normalized. Clustering Analysis and Principal Component Analysis were used to group patients with similar gene expression profiles. Genes that are differentially expressed between ER-positive and ER-negative samples were selected.
  • RNA isolated from LCM procured breast cancer cells was subjected to two-round T7 based amplification in target preparation, versus one round amplification with bulk tissue RNA.
  • Expression levels of 21 control genes were compared between LCM data set and bulk tissue set to demonstrate the fidelity of linear amplification.
  • Control gene list SEQ ID NO: Name 112 protein phosphatase 2, regulatory subunit B (B56), delta isoform 113 CCCTC-binding factor (zinc finger protein) 114 solute carrier family 4 (anion exchanger), member 1, adaptor protein 115 ribonuclease P 116 hypothetical protein FLJ20188 117 KIAA0323 protein 118 cDNA FLJ12469 119 translation initiation factor eIF-2b delta subunit 120 heterogeneous nuclear ribonucleoprotein K 121 hydroxymethylbilane synthase 122 cDNA DKFZp586O0222 123 chromosome 20 open reading frame 4 124 thyroid hormone receptor interactor 4 125 hypoxanthine phosphoribosyltransferase 1 (Lesch-Nyhan syndrome) 126 DnaJ (Hsp40) homolog, subfamily C, member 8 127 dual specificity phosphatase 11 (RNA/RNP complex 1-interacting) 128 calcium binding atopy-
  • Table 8 Clinical characteristics of patients Characteristic No. of patients (%) Age in years ⁇ 40 1 (3) 40-44 5 (17) 45-49 8 (28) ⁇ 50 15 (52) Tumor diameter in mm ⁇ 20 11 (40) > 20 17 (59) Histologic grade II (intermediate) 5 (17) III (poor) 12 (41) Estrogen-receptor status Negative 11 (40) Positive 17 (59) Surgery Breast-conserving therapy 26 (90) Mastectomy 3 (10) Chemotherapy No 29 (100) Hormonal therapy No 29 (100) Disease-free survival in months ⁇ 48 13 (45) > 48 16 (55)
  • Figure 4 is a hierarchical clustering based on 5121 genes and shows that LCM and bulk tissue samples are completely separated based on global RNA expression profiles.
  • Figure 5 is a bar graph depicting the expression levels of 21 control genes (Table 6) in RNA isolates from LCM samples and bulk tissues and shows that an additional round of linear amplification used for RNA obtained by LCM did not cause differential expression of the control genes.
  • Figure 6 is a data analysis pathway and Figure 7 shows the PCA analysis with filtered gene sets.
  • Figure 8 is a pie chart where ER status was used to assign patient subgroups. Differentially expressed genes between ER-positive and ER-negative sub-clusters in both LCM and bulk tissue samples were defined by Student T-test.
  • Figure 9 is a series of bar graphs showing the results of pathway analysis by Gene Ontology for genes exclusively associated with ER in LCM samples, exclusively in bulk tissues, and for those that are common in both LCM and bulk tissue.
  • This Example reports the results of a validation study in which the 76-gene signature was used to predict outcomes of 132 patients obtained from 4 independent sources.
  • this Example further provides identification of substitutable components of the signature and describes how the substitutions lead to the identification of key pathways in an effective signature.
  • Fresh frozen tissue samples were collected from 132 patients who had been surgically treated for a breast tumor and had not received adjuvant systemic therapy. The patient samples used were collected between 1980 and 1996 ( Fig. 10 ). For each patient tissue sample, an H&E slide was used to evaluate the cell morphology. Then total RNA samples were prepared and the sample quality was analyzed by Agilent BioAnalyzer. The RNA samples were analyzed by microarray analysis. The fluorescence was quantified and the intensities were normalized. A relapse hazard score was calculated for each patient based on the expression levels of the 76-gene signature. The patients were classified into good and poor outcome groups. Figures 11 and 12 .
  • Figure 13 In order to evaluate the robustness of this gene signature, two statistical analyses were designed and used. Figure 13 . First, gene selection and signature construction procedures that were used to discover the 76-gene signature were repeated. As shown in Table 8, ten training sets of 115 patients each were randomly selected from the total of 286 patients. The remaining patients were served as the testing set.
  • the number of patients in a training set was increased to 80% of the 286 patients and used the remaining 20% of the patients as the testing set. This selection procedure was also repeated 10 times. In both procedures, Kaplan-Meier survival curves were used to ensure no significant difference in disease free survival between the training and the testing pair. Genes were selected and a signature was built from each of the training sets using Cox's proportional-hazards regression. Each signature was validated in the corresponding testing set. Furthermore, the 76-gene prognostic signature was assigned into functional groups using GO ontology classification. Pathways that cover significant numbers of genes in the signature were selected (p-value ⁇ 0.05 and >2 hits). The selected pathways were also evaluated in all the prognostic signatures derived from different training sets.
  • A. contains the results from 10 signatures using training sets of 115 patients and B. contains the results from 10 signatures using training sets of 80% of the patients.
  • pombe homolog 182 209448_at BC002439 Tat-interacting protein (30kD) 183 220960_x_at RPL22 NM_000983 ribosomal protein L22 184 207320_x_at STAU NM_004602 staufen (Drosophila, RNA-binding protein) transcript variant T4 185 208948_s_at MGC:4921 BC000830 MGC:4921 186 213037_x_at AJ132258 staufen protein, partial Drosophila, RNA-binding protein) 187 200725_x_at RPL10 NM_006013 ribosomal protein L10 188 200937_s_at RPL5 NM_000969 ribosomal protein L5 189 208696_at PNAS-102 AF275798 PNAS-102 mRNA chaperonin containing TCP1, subunit 5 (epsilon) 190 209593_s_at FKSG18 AF317129 FK
  • protein 1 (negative cofactor 2 ⁇ ) 292 204022_at Al668780 293 207660_at NM_004019 dystrophin (muscular dystrophy, Duchenne and Becker types), 294 215050_x_at BG325734 mitogen-activated protein kinase-activated protein kinase 2 295 204337_at AL514445 regulator of G-protein signaling 4 296 217687_at AA224446 297 221546_at BC000794 pre-mRNA splicing factor similar to S.
  • cell adhesion molecule 7 429 207695_s_at IGSF1 NM_001555 immunoglobulin superfamily, member 1 430 219249_s_at FLJ22041 NM_021939 hypothetical protein FLJ22041 431 213413_at FLJ13555 BG434174 FLJ13555 432 219793_at SNX16 NM_022133 sorting nexin 16 433 212035_s_at KIAA1067 Al817079 KIAA1067 protein 434 202730_s_at PDCD4 NM_014456 programmed cell death 4 435 202130_at sudD AA725102 suppressor of bimD6, Aspergillus nidulans homolog 436 206623_at PDE6A NM_000440 phosphodiesterase 6A, cGMP-specific, rod, ⁇ 437 222201_s_at KIAA1315 AB037736 KIAA1315 protein 438 221752_at

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Claims (13)

  1. Verfahren zur Beurteilung des Brustkrebs-Status, zum Einstufen von Brustkrebspatienten oder zur Feststellung eines Patientenbehandlungsprotokolls in einer einem Patienten entnommenen biologischen Probe, wobei man in den Verfahrensschritten die in der Probe vorliegenden Expressionsniveaus von Genen misst, die für durch SEQ ID NO: 96-111 in Tabelle 10 identifizierte mRNA codieren, wobei die Genexpressionsniveaus oberhalb bzw. unterhalb vorbestimmter Ausschlussgrenzniveaus den Brustkrebs-Status oder die Brustkrebsstufe anzeigen.
  2. Verfahren nach Anspruch 1, wobei die Stufe der Klassifizierung durch das TNM-System oder Patienten mit ähnlichen Genexpressionprofilen entspricht.
  3. Verfahren nach Anspruch 1, bei dem man ferner die Expressionsniveaus von Genen misst, die aus der aus den für durch SEQ ID NO: 36-95 in Tabelle 10 identifizierte mRNA codierenden Genen bestehenden Gruppe ausgewählt sind, wobei die Genexpressionsniveaus oberhalb bzw. unterhalb vorbestimmter Ausschlussgrenzniveaus den Brustkrebs-Status oder die Brustkrebsstufe anzeigen; insbesondere wobei mit dem Verfahren eine Prognose für ER-positive oder ER-negative Patienten bereitgestellt wird.
  4. Verfahren nach einem der Ansprüche 1-3, wobei die Probe mit einem aus der aus großformatiger Gewebepräparation (vorzugsweise aus einer Biopsie oder einem chirurgischen Präparat gewonnen) und Laser-Mikrodissektion bestehenden Gruppe ausgewählten Verfahren hergestellt wird.
  5. Verfahren nach einem der Ansprüche 1-3, bei dem man ferner:
    (a) das Expressionsniveau wenigstens eines für durch SEQ ID NO: 112-132 in Tabelle 10 identifizierte mRNA codierenden Gens misst; oder
    (b) das Expressionsniveau wenigstens eines konstitutiv in der Probe exprimierten Gens misst; oder
    (c) den Östrogenrezeptor(ER)-Status der Probe bestimmt; insbesondere wobei der ER-Status bestimmt wird, (i) indem das Expressionsniveau wenigstens eines den ER-Status anzeigenden Gens gemessen wird oder indem das Vorliegen von ER in der Probe gemessen wird oder wobei das Vorliegen von ER immunohistochemisch gemessen wird oder (ii) indem das Expressionsniveau wenigstens eines den ER-Status anzeigenden Gens gemessen wird oder indem das Vorliegen von ER in der Probe gemessen wird oder wobei das Vorliegen von ER immunohistochemisch gemessen wird.
  6. Verfahren nach einem der Ansprüche 1-3, wobei
    (a) die Probe aus einem Primärtumor gewonnen wird; oder
    (b) das Expressionsmuster der Gene mit einem einen Rezidivpatienten kennzeichnenden Expressionsmuster verglichen wird; insbesondere wobei der Vergleich von Expressionsmustern mit Mustererkennungsmethoden durchgeführt wird; ganz besonders wobei die Mustererkennungsmethoden die Verwendung einer Cox-Regressionsanalyse umfassen.
  7. Verfahren nach einem der Ansprüche 1-3, wobei
    (a) es sich bei den vorbestimmten Ausschlussgrenzniveaus um wenigstens 1,5-fache Über- bzw. Unterexpression in der Probe relativ zu gutartigen Zellen oder Normalgewebe handelt; oder
    (b) die vorbestimmten Ausschlussgrenzniveaus wenigstens eine Überexpression mit statistisch signifikantem p-Wert in der Probe mit metastatischen Zellen relativ zu gutartigen Zellen oder Normalgewebe aufweisen, insbesondere wobei der p-Wert weniger als 0,05 beträgt; oder
    (c) die Genexpression auf einem Mikroarray oder Gen-Chip gemessen wird, insbesondere wobei (i) es sich bei dem Mikroarray um einen cDNA-Array oder einen Oligonukleotid-Array handelt oder (ii) der Mikroarray oder Gen-Chip ferner ein oder mehrere interne Kontrollreagentien umfasst; oder
    (d) wobei die Genexpression durch mittels Polymerasekettenreaktion (PCR) von aus der Probe extrahierter RNA ausgeführte Nukleinsäureamplifikation bestimmt wird; insbesondere wobei es sich bei der PCR um Reverse-Transkription-Polymerasekettenreaktion (RT-PCR) handelt, gegebenenfalls ferner umfassend ein oder mehrere interne Kontrollreagentien.
  8. Verfahren nach einem der Ansprüche 1-3, wobei die Genexpression dadurch nachgewiesen wird, dass man
    (a) ein von dem Gen codiertes Protein misst oder nachweist, insbesondere wobei das Protein mit einem für das Protein spezifischen Antikörper nachgewiesen wird; oder
    (b) eine Charakteristik des Gens misst, insbesondere wobei die gemessene Charakteristik aus der aus DNA-Amplifikation, Methylierung, Mutation und allelischer Variation bestehenden Gruppe ausgewählt ist.
  9. Verwendung einer Zusammensetzung, umfassend einen aus Sonden zum Nachweisen der durch SEQ ID NO: 96-111 in Tabelle 10 identifizierten Gene bestehenden Sondensatz, bei einem Verfahren gemäß einem der Ansprüche 1 oder 3.
  10. Verwendung eines Kits zur Ausführung eines Tests zur Bestimmung einer Brustkrebsprognose in einer biologischen Probe, wobei das Kit Materialien zum Nachweisen isolierter Nukleinsäuresequenzen, ihrer Komplemente oder von Teilen davon einer Kombination von für durch SEQ ID NO: 96-111 in Tabelle 10 identifizierte mRNA codierenden Genen umfasst, wobei das Kit
    gegebenenfalls ferner Materialien zum Nachweisen isolierter Nukleinsäuresequenzen, ihrer Komplemente oder von Teilen davon einer Kombination von aus der aus den für durch SEQ ID NO: 36-95 in Tabelle 10 identifizierte mRNA codierenden Genen bestehenden Gruppe ausgewählten Genen umfasst, gegebenenfalls ferner umfassend
    i. Reagentien zur Ausführung einer Mikroarrayanalyse; oder
    ii. ein Medium, über das die Nukleinsäuresequenzen, ihre Komplemente oder Teile davon getestet werden.
  11. Mikroarray oder Gen-Chip zur Durchführung des Verfahrens nach Anspruch 1 oder 3; bestehend aus isolierten Nukleinsäuresequenzen, ihren Komplementen oder Teilen davon einer Kombination von für durch SEQ ID NO: 96-111 in Tabelle 10 identifizierte mRNA codierenden Genen
    und gegebenenfalls einem oder mehreren internen Kontrollreagentien; worin die Kombination ausreicht, um den Brustkrebs-Status oder das Rezidivrisiko in einer biologischen Probe zu charakterisieren.
  12. Mikroarray oder Gen-Chip nach Anspruch 11; wobei (i) es sich bei der Messung oder Charakterisierung um wenigstens 1,5-fache Über- bzw. Unterexpression handelt; oder (ii) die Messung eine Über- bzw. Unterexpression mit statistisch signifikantem p-Wert ergibt.
  13. Mikroarray oder Gen-Chip nach Anspruch 11 oder 12,
    (a) wobei der p-Wert weniger als 0,05 beträgt oder wobei der Mikroarray einen cDNA-Array oder einen Oligonukleotid-Array umfasst; und/oder
    (b) umfassend einen cDNA-Array oder einen Oligonukleotid-Array.
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